Bug 2461456 (CVE-2026-31534)

Summary: CVE-2026-31534 kernel: smb: client: let send_done handle a completion without IB_SEND_SIGNALED
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2026-04-24 15:02:31 UTC 
In the Linux kernel, the following vulnerability has been resolved:

smb: client: let send_done handle a completion without IB_SEND_SIGNALED

With smbdirect_send_batch processing we likely have requests without
IB_SEND_SIGNALED, which will be destroyed in the final request
that has IB_SEND_SIGNALED set.

If the connection is broken all requests are signaled
even without explicit IB_SEND_SIGNALED.
Comment 1 Keith Grant 2026-04-24 16:19:55 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026042431-CVE-2026-31534-059e@gregkh/T